Always enable the mime-handler-view feature for OOP PDF

chrome/common/chrome_content_client.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/common/chrome_content_client.h"
 
 #include "base/command_line.h"
 #include "base/debug/crash_logging.h"
 #include "base/files/file_util.h"
 #include "base/path_service.h"
@@ skipping 11 matching lines @@
 #include "chrome/common/crash_keys.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/common_resources.h"
 #include "components/dom_distiller/core/url_constants.h"
 #include "content/public/common/content_constants.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/common/user_agent.h"
 #include "extensions/common/constants.h"
+#include "extensions/common/feature_switch.h"
 #include "gpu/config/gpu_info.h"
 #include "net/http/http_util.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
 
 #include "widevine_cdm_version.h"  // In SHARED_INTERMEDIATE_DIR.
 
 #if defined(OS_WIN)
 #include "base/win/registry.h"
@@ skipping 92 matching lines @@
   // check on subsequent calls if yes.
   static bool skip_pdf_file_check = false;
   base::FilePath path;
   if (PathService::Get(chrome::FILE_PDF_PLUGIN, &path)) {
     if (skip_pdf_file_check || base::PathExists(path)) {
       content::PepperPluginInfo pdf;
       pdf.path = path;
       pdf.name = ChromeContentClient::kPDFPluginName;
       if (CommandLine::ForCurrentProcess()->HasSwitch(
               switches::kOutOfProcessPdf)) {
+        // Always enable the MIME handler view flag for OOP PDF.
+        extensions::FeatureSwitch::mime_handler_view()->SetOverrideValue(
+            extensions::FeatureSwitch::OVERRIDE_ENABLED);
         pdf.is_out_of_process = true;
         content::WebPluginMimeType pdf_mime_type(kPDFPluginOutOfProcessMimeType,
                                                  kPDFPluginExtension,
                                                  kPDFPluginDescription);
         pdf.mime_types.push_back(pdf_mime_type);
         // TODO(raymes): Make print preview work with out of process PDF.
       } else {
         content::WebPluginMimeType pdf_mime_type(kPDFPluginMimeType,
                                                  kPDFPluginExtension,
                                                  kPDFPluginDescription);
@@ skipping 382 matching lines @@
     int sandbox_type,
     int* sandbox_profile_resource_id) const {
   DCHECK(sandbox_profile_resource_id);
   if (sandbox_type == NACL_SANDBOX_TYPE_NACL_LOADER) {
     *sandbox_profile_resource_id = IDR_NACL_SANDBOX_PROFILE;
     return true;
   }
   return false;
 }
 #endif